Yesterday I've managed to make two boards - ESP core board and FTDI board, tested it and... it works :) yay! Of course I found some issues and I have to fix FTDI board a little bit. That's the first time I'm using other version of esp8266 then esp-01 and I discovered that both GPIO15 and GPIO0 have to be pulled down to put your ESP into upload/flash mode.

I moved recently to another country and I had to left my workshop behind. It doesn't help when you want to make things fast. Fortunately components in China are quite cheap and widely available so I've ordered everything I need. And my wife's jewellery workshop was perfect to drill in prototype boards although I had to improvise since I don't have 1.4 mm drill bit yet (machine header pins are quite wide).

I'm working now on OLED board (which has to be on the top of everything else), USB FTDI board and USB power board. FTDI board is designed for external USB2UART dongles, while USB FTDI will have FT232 onboard. But since ft232 module is quite expensive (comparing to everything else) I thought that having separate USB power board, just to power already programmed esp-core whould be perfect. I want to keep it as cheap as possible so having only one USB FTDI board should be enough.